“Really, Mr. Holmes, this exceeds anything which I could have imagined,” said Dr. Mortimer, gazing at my friend in amazement. “I could understand anyone saying that the words were from a newspaper; but that you should name which, and add that it came from the leading article, is really one of the most remarkable things which I have ever known. How did you do it?”

“I presume, Doctor, that you could tell the skull of a negro from that of an Esquimau?”

“Most certainly.”

“But how?”

“Because that is my special hobby. The differences are obvious. The supra-orbital crest, the facial angle, the maxillary curve, the—”

“But this is my special hobby, and the differences are equally obvious. There is as much difference to my eyes between the leaded bourgeois type of a Times article and the slovenly print of an evening half-penny paper as there could be between your negro and your Esquimau. The detection of types is one of the most elementary branches of knowledge to the special expert in crime, though I confess that once when I was very young I confused the Leeds Mercury with the Western Morning News. But a Times leader is entirely distinctive, and these words could have been taken from nothing else. As it was done yesterday the strong probability was that we should find the words in yesterday’s issue.”

“So far as I can follow you, then, Mr. Holmes,” said Sir Henry Baskerville, “someone cut out this message with a scissors—”

“Nail-scissors,” said Holmes. “You can see that it was a very short-bladed scissors, since the cutter had to take two snips over ‘keep away.’”

“That is so. Someone, then, cut out the message with a pair of short-bladed scissors, pasted it with paste—”

“Gum,” said Holmes.

“With gum on to the paper. But I want to know why the word ‘moor’ should have been written?”

“Because he could not find it in print. The other words were all simple and might be found in any issue, but ‘moor’ would be less common.”

“Why, of course, that would explain it. Have you read anything else in this message, Mr. Holmes?”